Endorphins
An introduction to a class of brain chemicals called endorphins is presented.
Question: In what way are endorphins and enkephalins similar to morphine?

Endorphins: Function
Read more about the function of endorphins.
Question: What is the function of endorphins?

Anatomy of the Eye and Ear
Perusal of this site will provide the reader with basic information on how "seeing" occurs.
Question: Describe how the process of "sight" occurs.

Eyecare Information
This site provides information on the structure of the eye and explores, in an introductory fashion, diseases of the eye and what may be done to correct them.
Question: Describe the function of these eye parts: lens, iris, pupil.

Common Eye Problems
This is an informative source about common eye problems, including cataracts.
Question: Who is most commonly affected by cataracts?

Ophthalmology
Learn more about this medical profession by exploring this site.
Question: Ophthalmology is the medical specialty that is dedicated to the study of what?

The Voice Center: Anatomy and Function of the Ear
The ear is made of three major parts.
Question: Name the three parts of the ear.

Causes of Hearing Impairment
Hearing impairment is the topic of discussion.
Question: Name several common causes of hearing impairment.

Exploratorium Museum
This site, located in the Palace of Fine Arts in the marina district of San Francisco, includes electronic exhibits, science news and resources, and a learning studio.
Question: A popular interactive program provided at this site is a "Cow Eye Dissection." Choose 'cow eye dissection' under "search". Perform this activity to learn more about the anatomy and physiology of an eye.